whats better to get good fps in games? turning vsync off or on? thank you

Possibly you need V-sync at the same FPS as FPS lock, so try setting your monitor's refresh rate to 100 Hz before playing this game.

It doesn't matter how many FPS, it can be 60 or 100, just follow the steps I posted and lock to whatever you want, I have tested many options, different v-syncs, different FPS locks, different settings, only the combination I posted works.

Well, I have a G-sync 144Hz monitor and +90 FPS is really needed to keep the motion smooth and nice, its all good and smooth as butter until the stutter occurs, going to try to lock the FPS around 90 and see if it works.

I have turned off in-game V-sync and used V-sync from Nvidia Control Panel and now everything is okay. Not really in benchmark, but in game everything is super smooth and tearing is gone, with in-game v-sync there is tearing even though its V-sync and FPS limit. So to conclude, you need FPS lock through Riva Tuner (mandatory, you'll get microstutter without it), ambient occlusion in game settings to High instead of Ultra (microstutter with Ultra) and V-sync from Nvidia Control Panel (in-game V-sync = tearing and strange game behavior when you get 60 FPS but game looks and feels like 30). For picture quality 150% res in game and SMAA+LumaSharpen from SweetFX.

@Krzych I have the same problem with GTX 980 ti 2 way SLI, playing on 1440p ultra settings, my FPS is locked at 100 and I get stuttering where there are a lot of enemies on the screen, it is so annoying I left playing the game because of this issue. :(

Ok it's not working properly. Sometimes game is entering some strange state when it looks and feels like 30 FPS but reported FPS is 60.

I am playing this right now with 2x GTX 1080 on 3440x1440 but with 150% resolution, so 5160x2160. There is some major microstuttering going on and fixes from this thread didn't help. However I noticed that vast majority of this stuttering is caused by Ultra ambient occlusion, and the other issue if frametimes spiking up to 100+ FPS even with v-sync. So ambient occlusion to High + 60 FPS limit in Riva Tuner + in-game V-sync and it works well now.

https://www.youtube.com/watch?v=AxUZPvzsPXY#t=3m00s (@3min21s)
"...but after this fix everything was super-smooth ."

Cheers

Does this fix the stuttering issue?
Im running gtx 980 ti in two way SLI and i get stuttering when there are a lot of enemies around even though my FPS is locked at 100s.